21469330 has 16 divisors (see below), whose sum is σ = 38697984. Its totient is φ = 8575920.

The previous prime is 21469321. The next prime is 21469339. The reversal of 21469330 is 3396412.

It is an interprime number because it is at equal distance from previous prime (21469321) and next prime (21469339).

It is not an unprimeable number, because it can be changed into a prime (21469339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12079 + ... + 13741.

It is an arithmetic number, because the mean of its divisors is an integer number (2418624).

Almost surely, 2^21469330 is an apocalyptic number.

21469330 is a deficient number, since it is larger than the sum of its proper divisors (17228654).

21469330 is a wasteful number, since it uses less digits than its factorization.

21469330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 21469330 is about 4633.5008363008. The cubic root of 21469330 is about 277.9326044725.

It can be divided in two parts, 2146 and 9330, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 21469330 in words is "twenty-one million, four hundred sixty-nine thousand, three hundred thirty".